TY - GEN
T1 - State of charge based droop control for coordinated power exchange in low voltage DC nanogrids
AU - Samende, Cephas
AU - Bhagavathy, Sivapriya M.
AU - McCulloch, Malcolm
N1 - © 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting /republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
PY - 2020/2/17
Y1 - 2020/2/17
N2 - Decentralized battery and solar photovoltaic (PV) system organized in the form of an autonomous low voltage DC nanogrid is a potentially low cost and scalable solution for electrifying rural areas without access to the national grid. Each DC nanogrid can be installed on a single home and used to supply basic lighting, charge mobile phones and power a television set. To provide enough power to meet productive energy uses such as irrigation, the DC nanogrid can be connected to neighboring DC nanogrids to form a cluster and exchange power. However, to achieve a coordinated power exchange in the cluster, new control strategies are required. In this paper, we propose a decentralized droop control method which uses a state of charge of the battery to coordinate the power exchange. The power exchange is achieved by scheduling a terminal voltage set point at each DC nanogrid based on the state of charge of the battery. The performance of the proposed method at achieving the power exchange is analyzed through simulations in Matlab/Simulink. The method does not require inter-unit communication. Therefore, the method is reliable, robust and scalable. Also, the method maintains low amounts of power flow in distribution lines during power exchange to reduce distribution line power losses.
AB - Decentralized battery and solar photovoltaic (PV) system organized in the form of an autonomous low voltage DC nanogrid is a potentially low cost and scalable solution for electrifying rural areas without access to the national grid. Each DC nanogrid can be installed on a single home and used to supply basic lighting, charge mobile phones and power a television set. To provide enough power to meet productive energy uses such as irrigation, the DC nanogrid can be connected to neighboring DC nanogrids to form a cluster and exchange power. However, to achieve a coordinated power exchange in the cluster, new control strategies are required. In this paper, we propose a decentralized droop control method which uses a state of charge of the battery to coordinate the power exchange. The power exchange is achieved by scheduling a terminal voltage set point at each DC nanogrid based on the state of charge of the battery. The performance of the proposed method at achieving the power exchange is analyzed through simulations in Matlab/Simulink. The method does not require inter-unit communication. Therefore, the method is reliable, robust and scalable. Also, the method maintains low amounts of power flow in distribution lines during power exchange to reduce distribution line power losses.
KW - low voltage DC nanogrid
KW - cluster
KW - power exchange
KW - state of charge
KW - droop control
KW - power losses
KW - rural areas
U2 - 10.1109/PEDS44367.2019.8998955
DO - 10.1109/PEDS44367.2019.8998955
M3 - Conference contribution book
SN - 9781538665008
T3 - Proceedings of the IEEE International Conference on Power Electronics and Drive Systems (PEDS)
SP - 1
EP - 6
BT - 2019 IEEE 13th International Conference on Power Electronics and Drive Systems (PEDS)
PB - IEEE
CY - Piscataway, N.J.
T2 - 2019 IEEE 13th International Conference on Power Electronics and Drive Systems (PEDS)
Y2 - 9 July 2019 through 12 July 2019
ER -